Comtrol eCos - Manual (Page 163)

fis lock
Name
fis lock — Lock flash area
Synopsis
fis lock {-f flash_address } {-l length }
Arguments
Name Type Description Default
flash_address Number Address of area to be
locked.
length Number Length of area to be
locked.
Description
This command is used to write-protect (lock) a portion of flash memory, to prevent accidental overwriting of
images. In order to make make any modifications to the flash, a matching fis unlock command must be issued.
This command is optional and will only be provided on hardware which can support write-protection of the flash
space.
Note: Depending on the system, attempting to write to write-protected flash may generate errors or warnings,
or be benignly quiet.
Examples
Lock an area of the flash
RedBoot> fis lock -f 0xa0040000 -l 0x20000
... Lock from 0xa0040000-0xa0060000: .
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